摘要
采用微波辐照法制备了膨胀石墨(EG),利用EG、氯化聚乙烯(CPE)和聚氯乙烯(PVC)的固相剪切碾磨(S3 M)制备了EG-CPE-PVC复合粉体,复合粉体进一步与PVC、热稳定剂和增塑剂混匀,经塑化和模压成型得到类石墨烯/CPE-PVC复合材料。用粒度分析、XRD、AFM、SEM和TEM等手段表征了复合粉体及其复合材料的结构与性能。结果表明:S3 M实现了体系的粉碎、分散,EG片层的剥离及与CPE-PVC的纳米复合。CPE的加入实现了EG的进一步剥层,使EG片层的厚度达到1~3层,达到了EG的石墨烯化目标。当EG质量分数为3%时,类石墨烯/CPE-PVC复合材料的电导率呈指数上升,与PVC相比提高了8个数量级;当EG质量分数超过4%时,电导率再次激增,出现逾渗现象;在EG质量分数为5%时,电导率达到0.01S/m,复合材料表现出良好的抗静电性能。
The expanded graphite(EG)was prepared by microwave irradiation,through solid state shear milling(S3 M)with EG,chlorinated polyethylene(CPE)and polyvinyl chloride(PVC),EG-CPE-PVC co-powders were prepared.The co-powders were then mixed homogeneous with PVC,thermal stabilizer and plasticizer.And the graphene-like/CPE-PVC composites were obtained by plastification and molding.Structure and properties of copowders and composites were characterized by analysis of particle size and distribution,XRD,AFM,SEM and TEM.Results show that S3 M can realize pulverizing,dispersion,exfoliation of EG layer and nano-compounding of EG-CPEPVC.Further more,the addition of CPE realizes the further exfoliation of EG,which makes the EG thickness reaches to 1-3layers and achieves the goal of transforming EG to graphene.When the EG mass fraction reaches 3%,compared with PVC,the conductivity of graphene-like/CPE-PVC composites shows exponential rise and increases 8orders of magnitude,while EG mass fraction is over 4%,the conductivity surges again and appears the percolation phenomenon.When the EG mass fraction reaches 5%,the conductivity is up to 0.01S/m,and the composites show good antistatic property.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2014年第5期1219-1227,共9页
Acta Materiae Compositae Sinica
基金
国家自然科学基金面上项目(51173145)
陕西省"13115"科技创新工程重大科技专项(2009ZDKG-62)
关键词
固相剪切碾磨
氯化聚乙烯
聚氯乙烯
膨胀石墨
石墨烯
solid state shear milling
chlorinated polyethylene
polyvinyl chloride
expanded graphite
graphene
